Day-light bulb

Was trying to get the reflection of the sky in an old light bulb, in a a sort of ironic 'dead light bulb being lit from the outside not the inside' type way (think I've had too much fresh air today!). Used black card as a background.

***Please view large if possible***

All comments appreciated as usual

Is there a strange blue cast to the right of the bulb or it is my monitor? Think something a bit odd may have happened in the compression.